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@rydmike rydmike released this 14 May 13:13
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2.0.0
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2.0.0

May 14, 2024

This release adds support for the revised Material-3 ColorScheme released in Flutter version 3.22.0 and for seeded scheme variants, that will arrive in the Flutter stable release after 3.22.x.

  • CHANGE

    • Bring the internal Material Color Utilities (MCU) library version to parity with its latest package release 0.11.1. Flutter SDK stable 3.22 still uses MCU 0.8.0, but the Flutter master channel already uses MCU 0.11.1.
    • The FlexPaletteType.extended tones got two new tones added, tone 2, and 24. It now has 27 tones.

  • NEW

    • Support revised Material-3 ColorScheme with the new colors primaryFixed, primaryFixedDim, onPrimaryFixed, onPrimaryFixedVariant, secondaryFixed, secondaryFixedDim, onSecondaryFixed, onSecondaryFixedVariant, tertiaryFixed, tertiaryFixedDim, onTertiaryFixed, onTertiaryFixedVariant, surfaceDim, surfaceBright, surfaceContainerLowest, surfaceContainerLow, surfaceContainer, surfaceContainerHigh and surfaceContainerHighest.

    • New alternative way to specify the used seeding algorithm in SeedColorScheme.fromSeeds by providing new enum value FlexSchemeVariant to its variant property.

      • In addition to supporting selection of built-in FlexTones, the variant property also supports using Flutter SDK, MCU based scheme variants tonalSpot, monochrome, neutral, vibrant, expressive, content,rainbow and fruitSalad in by specifying them in property variant in SeedColorScheme.fromSeeds. In Flutter 3.22 only the default tonalSpot is available, but with FSS you can use any of the other variants as well already in Flutter 3.22. The other variants are not yet available in Flutter 3.22, but they are available in the ColorScheme API in the master channel and will be available in Flutter ColorScheme.fromSeed in the next stable release after 3.22. With FSS you can use them already starting from Flutter 3.22.0.
      • With the variants enum property you can also select built-in FlexTones that you could use before in SeedColorScheme.fromSeeds in tones. The FlexTones are still available and can be used as before, it has some advantages. With tones you can create customized seed extractions based on FlexTones and you can use tones surface quick modifiers, onMainsUseBW, onSurfacesUseBW and surfacesUseBW.
      • When using variants, if the variant is one of the Flutter SDK/MCU variants, it will not use more than one key color, the primary as seed color. The FlexSchemeVariant that have their property isFlutterScheme set to true are part of the Flutter SDK/MCU variants.
      • The Flutter SDK/MCU variants are tonalSpot, fidelity, monochrome, neutral, vibrant, expressive, content, rainbow and fruitSalad.
      • The other FlexSchemeVariant that have their property isFlutterScheme set to false are part of the FlexTones variants using the corresponding built-in FlexTones as seed extraction. The variants are material, material3Legacy, soft, vivid, vividSurfaces, highContrast, ultraContrast, jolly, vividBackground, oneHue, candyPop and chroma. The chroma option is similar to the new nice SDK/MCU one called fidelity, in that it follows chroma of seed color, with the added benefit that it can use a separate seed color for each tonal palette.
      • The APIs variant and tones are mutually exclusive, you can only use one of them in SeedColorScheme.fromSeeds. Both can be unspecified, but if you specify one, the other must be unspecified/null.

  • A new FlexTones.material3Legacy was added. This FlexTones configuration preserves and provides access to the seed generation used by Flutter prior to Flutter version 3.22 and as used by FlexTones.materialin FlexSeedScheme before version 2.0.0. If you in Flutter 3.22 and FlexSeedScheme 2.0.0 need to replicate this style you can use this FlexTones in SeedColorScheme.fromSeeds property tones or the FlexSchemeVariant.material3Legacy in variants.

  • BREAKING

    • The Material-3 ColorScheme colors background, onBackground and surfaceVariant have been deprecated since they are also deprecated in Flutter 3.22.
      • These deprecated colors are still supported in SeedColorScheme.fromSeeds and FlexTones, but they will be removed in a future release. They are replaced by surface, onSurface and surfaceContainerLowest. There are also many new surface colors, like surfaceDim, surfaceBright and surfaceContainerLowest in the new Material-3 ColorScheme in Flutter 3.22.
      • The fact that these deprecated colors are still referenced in the package will reduce its pub.dev score with 10 points, but they are kept for now to maintain FULL compatibility with Flutter 3.22 that also still provides values for these deprecated colors and uses them in code. This package needs to provide the same values to be fully compatible. The ColorScheme colors background, onBackground and surfaceVariant may only be fully removed when they have been removed from the Flutter SDK stable channel. If later tests show they can be removed without breaking any styles earlier, they will be removed in a future release of this package, even if they are still available in the Flutter SDK stable channel. A future dev version may also remove them to provide compatibility with the Flutter master channel when they are removed there.

  • BREAKING STYLES

    • All built-in FlexTones now use the paletteType extended via FlexPaletteType.extended as default for additional tone fidelity. This is needed for compatibility with Flutter 3.22 and its revised ColorScheme.

    • The default tones for the built-in FlexTones have been adjusted to match the new Material-3 ColorScheme in Flutter 3.22. The new tones and default styles are marginally different but also better than in previous Flutter versions. If you need the result and style used in Flutter 3.19 and earlier, you can use the FlexTones.material3Legacy as tones in SeedColorScheme.fromSeeds to get the result FlexTones.material produced in FSS before version 2.0.0 and that was also the default in Flutter in version 3.19 and earlier.

    • The FlexSchemeVariant.tonalSpot is the variant that Flutter SDK uses from MCU in ColorScheme.fromSeed in Flutter 3.22 and later when you make seed generated color schemes with it. This generated scheme is different from the one ColorScheme.fromSeed generated in Flutter 3.19 and earlier. If you need the result and style used in Flutter 3.19 and earlier, you can use the material3Legacy as tones or variant in SeedColorScheme.fromSeeds to get the result FlexTones.material produced in FSS before version 2.0.0 and that was also the default in Flutter in version 3.19 and earlier when using ColorScheme.fromSeed.

    • The FlexTones.material has been updated and now produces the same result as tonalSpot in tests. There may be some edge cases where there are rounding differences. The material alternative can be used both in variant and tones. It provides the advantages over tonalSpot that since it is a FlexTones, it can use multiple seed colors and if used in tones, its results can be quick adjusted with onMainsUseBW, onSurfacesUseBW and surfacesUseBW. The tonalSpot is a Flutter SDK/MCU variant and does not support these customizations.

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